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Old 10-16-2010, 08:28 AM   #1
Denali
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Default leaking v-band

not really sure where to post this but w/e.. my turbo has a vband connection to the downpipe, i think it uses a vibrant clamp. with the clamp torqued to proper spec it was leaking from between one of the gaps in the clamping area, got the exhaust nice and hot then tightened as much as i dared.. still leaks but not as bad. should i just buy another clamp and tighten this one as much as it will take till the leak stops .. or the clamp breaks. remove the exhaust and grind any imperfections of flanges, crush the clamp a bit or maybe some of that copper exhaust rtv?
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Old 10-16-2010, 08:49 AM   #2
nhsilversti
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i suggest you clean the mating surfaces of the v-band flanges, get the corners cleaned up well. if its a new addition and your finding the leak now, it was welded without the flanges being correctly mated. or lastly, if it is just the slightest bit of black you see, dont worry about it as it is post turbo.
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Old 10-24-2010, 06:09 PM   #3
Denali
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heres a pic the turbo's flange is stock from garett, the downpipe is part of the turbo kit i will try taking it apart and checking for anything
there is a little bit of black on the top that i am not worried about, but you can see the wastegate looks to have quite a bit of exhaust crap on it... this it from 250km worth of driving on low boost just breaking in and slowly tuning the motor
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Old 10-24-2010, 06:11 PM   #4
MartinSTi05
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Take the turbo flange and the DP flange and lap them on a sheet of glass. They will seal like a million bucks. I also use a VERY small amount of permatex ultra copper on the sealing face.
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Old 10-24-2010, 06:13 PM   #5
Denali
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by lap i guess you mean sand?
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Old 10-24-2010, 06:26 PM   #6
MartinSTi05
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You could use a flat table with sand papaer, or use a pane of glass and lapping compound. Just make sure you use a fig8 motion to ensure the surfaces stay flat.
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Old 11-20-2010, 12:45 PM   #7
Bariga
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take down pipe off, clean flanges, spray wd40 on clamp and tight it down.
The design of the flange is to retarder its just 2 flat flanges lay on each other!
! There should be a groove like on the tial turbo to make it 100% leak free!

Last edited by Bariga; 12-01-2010 at 02:53 AM.
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Old 12-11-2010, 06:34 AM   #8
methaddict
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Old 12-12-2010, 12:49 AM   #9
Bariga
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tell me wtf is the point of vband if its steal leaks lol
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